Display device

ABSTRACT

Disclosed is a display device. The display device of the present disclosure may include: a base; a head spaced apart from the base and including a display panel; a pole extending from the base in a direction in which the head is spaced apart from the base; an articulated connector coupled to the head; an elevating module movably coupled to the pole in a length direction of the pole; and an arm extending in a direction intersecting the head and the pole, the arm having one side connected to the articulated connector and the other side connected to the elevating module.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of earlier filing date and right ofpriority of Korean Provisional Application No. 10-2021-0095813, filed onJul. 21, 2021, Korean Provisional Application No. 10-2022-0008832, filedon Jan. 20, 2022, and International Application No. PCT/KR2022/001623,filed on Jan. 28, 2022, the contents of which are incorporated herein byreference in their entirety.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present disclosure relates to a display device.

2. Description of the Related Art

As the information society develops, the demand for display devices isalso increasing in various forms. In response to this, various displaydevices such as Liquid Crystal Display Device (LCD), Plasma DisplayPanel (PDP), Electroluminescent Display (ELD), Vacuum FluorescentDisplay (VFD), and Organic Light Emitting Diode (OLED) have beenresearched and used in recent years.

Among them, an LCD panel includes a TFT substrate and a color substratethat is opposite to each other with a liquid crystal layer interposedtherebetween, and may display an image by using light provided from abacklight unit. In addition, an OLED panel may display an image bydepositing an organic material layer that can emit light by itself on asubstrate on which a transparent electrode is formed.

Recently, a lot of researches have been made on a structure for freelyadjusting the angle or position of a display panel.

SUMMARY OF THE INVENTION

One object of embodiments of the present disclosure is to solve theabove and other problems.

Another object of embodiments of the present disclosure is to provide adisplay device having a stand of a display panel.

Another object of embodiments of the present disclosure is to provide astructure that can freely adjust the angle or position of a head havinga display panel.

Another object of embodiments of the present disclosure is to provide astructure capable of implementing various motion operations of a displaypanel, such as a pivot motion, a tilt motion, a swivel motion, and anelevating motion, independently of each other.

Another object of embodiments of the present disclosure is to provide amechanism for automatically adjusting the motion of a head in auser-friendly manner.

Another object of embodiments of the present disclosure is to provide astructure capable of firmly coupling a cradle for placing a terminalsuch as a smartphone to a head.

Another object of embodiments of the present disclosure is to provide astructure capable of wirelessly charging a terminal such as a smartphoneplaced on a cradle.

In accordance with an aspect of the present disclosure, a display devicemay include: a base; a head spaced apart from the base and including adisplay panel; a pole extending from the base in a direction in whichthe head is spaced apart from the base; an articulated connector coupledto the head; an elevating module movably coupled to the pole in a lengthdirection of the pole; and an arm extending in a direction intersectingthe head and the pole, the arm having one side connected to thearticulated connector and the other side connected to the elevatingmodule.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptionin conjunction with the accompanying drawings, in which:

FIGS. 1 to 42 are diagrams illustrating examples of a display deviceaccording to embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Description will now be given in detail according to exemplaryembodiments disclosed herein, with reference to the accompanyingdrawings. For the sake of brief description with reference to thedrawings, the same or equivalent components may be denoted by the samereference numbers, and description thereof will not be repeated.

In general, suffixes such as “module” and “unit” may be used to refer toelements or components. Use of such suffixes herein is merely intendedto facilitate description of the specification, and the suffixes do nothave any special meaning or function.

In the present disclosure, that which is well known to one of ordinaryskill in the relevant art has generally been omitted for the sake ofbrevity. The accompanying drawings are used to assist in easyunderstanding of various technical features and it should be understoodthat the embodiments presented herein are not limited by theaccompanying drawings. As such, the present disclosure should beconstrued to extend to any alterations, equivalents and substitutes inaddition to those which are particularly set out in the accompanyingdrawings.

It will be understood that although the terms first, second, etc. may beused herein to describe various elements, these elements should not belimited by these terms. These terms are only used to distinguish oneelement from another.

It will be understood that when an element is referred to as being“connected with” another element, there may be intervening elementspresent. In contrast, it will be understood that when an element isreferred to as being “directly connected with” another element, thereare no intervening elements present.

A singular representation may include a plural representation unlesscontext clearly indicates otherwise.

In the present application, it should be understood that the terms“comprises, includes,” “has,” etc. specify the presence of features,numbers, steps, operations, elements, components, or combinationsthereof described in the specification, but do not preclude the presenceor addition of one or more other features, numbers, steps, operations,elements, components, or combinations thereof.

The direction indications of up (U), down (D), left (Le), right (Ri),front (F), and rear (R) shown in the drawings are only for convenienceof description, and the technical concept disclosed in the presentspecification is not limited thereto.

Referring to FIG. 1 , a display device 1 may include a head 10. The head10 can display an image. The head 10 may be referred to as a display 10or a display unit 10.

The head 10 may include a first long side LS1, a second long side LS2opposite to the first long side LS1, a first short side SS1 adjacent tothe first long side LS1 and the second long side LS2, and a second shortside SS2 opposite to the first short side SS1. Meanwhile, forconvenience of explanation, it is illustrated and described that thelengths of the first and second long sides LS1 and LS2 are longer thanthe lengths of the first and second short sides SS1 and SS2, but a casein which the lengths of the first and second long sides LS1 and LS2 areapproximately equal to the lengths of the first and second short sidesSS1 and SS2 may be possible.

A direction parallel to the short sides SS1 and SS2 of the head 10 maybe referred to as a first direction DR1 or an up-down direction. Adirection parallel to the long sides LS1, LS2, and long Side of the head10 may be referred to as a second direction DR2 or a left-rightdirection. A direction perpendicular to the long sides LS1 and LS2 andthe short sides SS1 and SS2 of the head 10 may be referred to as a thirddirection DR3 or a front-rear direction.

A direction in which the head 10 displays an image may be referred to asa front direction (F, z), and a direction opposite to this may bereferred to as a rear direction R. The side of the first short side SS1may be referred to as a left side (Le, x). The side of the second shortside SS2 may be referred to as a right side Ri. The side of the firstlong side LS1 may be referred to as an upper side (U, y). The side ofthe second long side LS2 may be referred to as a lower side D.

The first long side LS1, the second long side LS2, the first short sideSS1, and the second short side SS2 may be referred to as an edge of thehead 10. In addition, a point where the first long side LS1, the secondlong side LS2, the first short side SS1, and the second short side SS2meet each other may be referred to as a corner.

A point where the first short side SS1 and the first long side LS1 meetmay be a first corner C1. A point where the first short side SS1 and thesecond long side LS2 meet may be a second corner C2. A point where thesecond short side SS2 and the second long side LS2 meet may be a thirdcorner C3. A point where the second short side SS2 and the first longside LS1 meet may be a fourth corner C4.

Referring to FIGS. 1 and 2 , the display device 1 may include a base 20,a pole 30, and a motion module MM.

The base 20 may have a flat cylinder shape as a whole. The base 20 maybe placed on the ground. For example, a plurality of moving wheels 20 w(see FIG. 34 ) may be mounted on the lower surface of the base 20.Accordingly, a user can smoothly move the base 20 on the ground. Thebase 20 may be referred to as a moving base.

The pole 30 may extend long in the vertical direction. The lower end ofthe pole 30 may be coupled to the base 20. The pole 30 may be adjacentto the periphery of the upper surface of the base 20. A handle 39 may becoupled to the upper end of the pole 30. The pole 30 and theabove-described base 20 may be collectively referred to as a stand.

The motion module MM may extend in a direction intersecting the pole 30.One side of the motion module MM may be coupled to a rear side of thehead 10. The other side of the motion module MM may be adjacent to theupper end of the pole 30, and may be coupled to the pole 30. Anarticulated connector 40 may be coupled to the rear side of the head 10,an elevating module 60 may be coupled to the pole 30, and an arm 50 mayconnect the articulated connector 40 and the elevating module 60.

Accordingly, the head 10 may be supported by the motion module MM, thepole 30, and the base 20, and may be spaced upward from the ground.

Referring to FIGS. 3 and 4 , the head 10 may include a display panel 11,a middle cabinet 12, a frame 13, an end frame 14, and a back cover 15.

The display panel 11 may form the front surface of the head 10. Forexample, the display panel 11 may be an OLED panel, an LCD panel, or anLED panel. The display panel 11 may divide an image into a plurality ofpixels and output an image by matching color, brightness, and saturationfor each pixel. The display panel 11 may be divided into an active areain which an image is displayed and a de-active area in which an image isnot displayed. The display panel 11 may generate light corresponding toa color of red, green, or blue according to a control signal.

The middle cabinet 12 may extend along the periphery of the displaypanel 11. A horizontal portion 12H may be positioned in the frontdirection of the display panel 11. A vertical portion 12V may intersectthe horizontal portion 12H, and may cover the side surface of thedisplay panel 11. A front pad 11F may be positioned between thehorizontal portion 12H and the display panel 11, and may be coupled tothe horizontal portion 12H. A rear pad 11R may be opposite to the frontpad 11F with respect to the display panel 11. For example, the middlecabinet 12 may include a metal or plastic material. The middle cabinet12 may be referred to as a side frame or a guide panel.

The frame 13 may be positioned in the rear direction of the displaypanel 11. Electronic components such as a printed circuit board (PCB)may be coupled to the rear surface of the frame 13. For example, theframe 13 may include a metal material. The frame 13 may be referred toas a plate or a module cover.

A fixing portion 13H may protrude rearward from the rear surface of theframe 13. The fixing portion 13H may be a pemnut. A distance between thefixing portions 13H may comply with a Video Electronics StandardsAssociation (VESA) standard.

The end frame 14 may form a periphery of the head 10. The horizontalportion 14H may be positioned in the front direction of the horizontalportion 12H of the middle cabinet 12. The vertical portion 14V may covera side surface of the vertical portion 12V of the middle cabinet 12. Forexample, the end frame 14 may include a metal or plastic material.Meanwhile, in some embodiment, the end frame 14 may be omitted, and inthis case, the middle cabinet 12 may form the periphery of the head 10.

The back cover 15 may form a rear surface of the head 10. The back cover15 may be positioned in the rear direction of the frame 13 and may becoupled to the frame 13. A portion of the frame 13 including theaforementioned fixing portion 13H may be exposed to the outside througha hole 15 h formed in the center of the back cover 15. For example, theback cover 15 may include a metal or plastic material. For example, ajersey made of a fabric material may be detachably coupled to the rearsurface of the back cover 15.

Referring to FIGS. 4 and 5 , a fixing member 41 may be positioned in thehole 15 h of the back cover 15, and may be positioned in the reardirection of the frame 13.

A fixing plate 41 a may have a circular plate shape as a whole, and mayinclude a fixing hole 41H aligned with the fixing portion 13H. A spacingbetween the fixing holes 41H may comply with the VESA standard. A fixingring 41 b may be positioned between the outer circumference of thefixing plate 41 a and a portion defining the hole 15 h of the back cover15, and may be coupled or fixed thereto. A fastening member such as ascrew may be fastened to the fixing portion 13H through the fixing hole41H. Accordingly, the fixing member 41 may be coupled to or fixed to theframe 13.

Referring to FIGS. 5 and 6 , the articulated connector 40 may includethe aforementioned fixing member 41. A front bracket 42 may bepositioned in the rear direction of the fixing member 41, and may have aplate shape as a whole. A pair of first protrusions 42 a may protrudeupward from the upper side of the front bracket 42, and may be spacedapart from each other in the left-right direction. A pair of secondprotrusions 42 b may protrude downward from the lower side of the frontbracket 42, and may be spaced apart from each other in the left-rightdirection. The pair of first protrusions 42 a and the pair of secondprotrusions 42 b may be inserted and coupled to holes (not shown) formedin the fixing plate 41 a. Accordingly, the front bracket 42 may bedetachably coupled to the fixing plate 41 a (see FIG. 11 ).

A pivot shaft 44 may extend in the front-rear direction. The diameter ofa head 44 a of the pivot shaft 44 may be greater than the diameter of abody 44 b. The body 44 b may have a cylindrical shape in which a part ofa side surface is cut-out. A pair of cut-outs 44 c and cut-outs may beformed on the side surface of the body 44 b, and may be opposite to eachother. The hole 42 h of the front bracket 42 may be formed in the centerof the front bracket 42, and may be penetrated by the body 44 b. Theshape of the hole 42 h of the front bracket 42 may be the same as theshape of the longitudinal cross-section of the body 44 b. Accordingly,the pivot shaft 44 and the front bracket 42 may rotate together withrespect to the axial direction of the pivot shaft 44. That is, the pivotshaft 44 may provide a pivot axis.

A front grab 45 a may be positioned between the head 44 a and the frontsurface of the front bracket 42. The hole 45 ah of the front grab 45 amay be aligned with the hole 42 h of the front bracket 42, and may havethe same shape as the hole 42 h. The body 44 b may penetrate the holes45 ah and 42 h. Protrusions 45 af may protrude rearward from around theperiphery of the front grab 45 a, may be spaced apart from each other atintervals of 90 degrees, and may be inserted and coupled to a groove orhole 42 f of the front bracket 42. Accordingly, the coupling between thepivot shaft 44 and the front bracket 42 may be further strengthened bythe front grab 45 a.

Referring to FIGS. 7 and 8 , the rear bracket 43 may be positioned inthe rear direction of the front bracket 42. The rear bracket 43 mayinclude a mount 43F, a left wing 43L, and a right wing 43R.

The mount 43F may face the front bracket 42 and may have a circularmount hole 43Fh. The body 44 b of the pivot shaft 44 may penetrate themount hole 43Fh, and may rotate independently of the mount 43F withinthe mount hole 43Fh. In other words, even when the pivot shaft 44rotates, the rear bracket 43 may not rotate. For example, at least onewasher 43Fw may be positioned between the front bracket 42 and the mount43F, and may have a circular hole through which the body 44 b passes.

The left wing 43L may extend in the rear direction from the left side ofthe mount 43F. The right wing 43R may extend in the rear direction fromthe right side of the mount 43F. A plurality of members 45 c describedlater (45 c 1, 45 c 2, 45 c 3, 45 c 4, 45 c 5) may be coupled to themount 43F at between the left wing 43L and the right wing 43R.

A rear grab 45 c 1 may be opposite to the washer 43Fw with respect tothe mount 43F, and may have a circular hole 45 ch through which the body44 b of the pivot shaft 44 passes. The protrusions 45 cf may protrude inthe front direction from around the periphery of the rear grab 45 c 1,may be spaced apart from each other at intervals of 90 degrees, and maybe inserted and coupled to a groove or hole 42Ff of the mount 43F.Accordingly, the rear grab 45 c 1 may be coupled to the rear surface ofthe mount 43F.

In addition, a plurality of fixing holes 45 ca and a plurality of slots45 cb may be formed to penetrate the rear grab 45 c 1 in the thicknessdirection of the rear grab 45 c 1, and may be separated from each otherin the circumferential direction of the rear grab 45 c 1. The pluralityof fixing holes 45 ca and the plurality of slots 45 cb may bealternately positioned in the circumferential direction of the rear grab45 c 1. For example, the fixing holes 45 ca or the slots 45 cb may bespaced apart from each other at intervals of 90 degrees. In thecircumferential direction of the rear grab 45 c 1, the length of theslot 45 cb may be greater than the length of the fixing hole 45 ca.

A disc 45 c 2 may be positioned in the rear direction of the rear grab45 c 1, and may have a hole 45 c 2 h through which the body 44 b of thepivot shaft 44 passes. The shape of the hole 45 c 2 h may be the same asthe shape of the longitudinal cross-section of the body 44 b. Aplurality of bosses 45 cc may protrude from the front surface of thedisc 45 c 2 toward the rear grab 45 c 1, and may be spaced apart fromeach other in the circumferential direction of the disc 45 c 2. Forexample, the bosses 45 cc may be spaced apart from each other atintervals of 90 degrees. The size of the boss 45 cc may be the same asor correspond to the size of the fixing hole 45 ca. That is, when theboss 45 cc is inserted into the fixing hole 45 ca, the rotation of thedisc 45 c 2 and the pivot shaft 44 may be limited by the rear grab 45 c1. Further, when the boss 45 cc is inserted into the slot 45 cb, thedisc 45 c 2 and the pivot shaft 44 may rotate within the trajectory of aslot 45 cb.

The washer 45 c 3 may be positioned in the rear direction of the disc 45c 2, and may have a circular hole (no reference numeral) through whichthe body 44 b of the pivot shaft 44 passes.

A disc spring 45 c 4 may be opposite to the disc 45 c 2 with respect tothe washer 45 c 3, and may have a circular hole (no reference numeral)through which the body 44 b of the pivot shaft 44 passes. The discspring 45 c 4 may be resilient and may be convex in the front directionor rear direction. The disc spring 45 c 4 may generate an elastic forcein the axial direction of the pivot shaft 44. For example, the discspring 45 c 4 may be provided as a pair. In this case, the first discspring 45 c 41 and the second disc spring 45 c 42 may be convex indifferent directions. The first disc spring 45 c 41 may be convex in therear direction, and the second disc spring 45 c 42 may be convex in thefront direction from the rear direction of the first disc spring 45 c41. Accordingly, the overall elastic force of the first and second discsprings 45 c 41 and 45 c 42 may be strengthened.

A cap 45 c 5 may be positioned in the rear direction of the disc spring45 c 4, and may have a hole 45 c 5 h through which the body 44 b of thepivot shaft 44 passes. The shape of the hole 45 c 5 h may be the same asthe shape of the longitudinal cross-section of the body 44 b. The cap 45c 5 may be coupled to or fixed to the distal end of the body 44 b.

Accordingly, the pivot shaft 44 may rotate together with the frontbracket 42, the front grab 45 a, the disc 45 c 2, and the cap 45 c 5. Inaddition, the pivot shaft 45 may rotate independently of the washer43Fw, the rear bracket 43, the rear grab 45 c 1, the washer 45 c 3, andthe disc spring 45 c 4. In other words, even when the pivot shaft 45rotates, the washer 43Fw, the rear bracket 43, the rear grab 45 c 1, thewasher 45 c 3, and the disc spring 45 c 4 may not rotate.

Besides, a user may pivot the head 10 (see FIG. 5 ) with respect to thepivot shaft 44. For example, the head 10 may be pivoted within a rangeof +90 degrees to −90 degrees. In addition, due to the elastic force ofthe above-described disc spring 45 c 41, 45 c 2, the head 10 maymaintain a certain pivot angle, as long as an external force greaterthan or equal to a certain level is not applied. In addition, during thepivoting movement of the head 10, a user may feel a fastening feelingaccording to the fastening of the boss 45 cc and the fixing hole 45 caor the slot 45 cb. That is, when the boss 45 cc comes out of the slot 45cb and is inserted into the fixing hole 45 ca, a user can feel that thehead 10 is positioned at a pivot angle of 0 degrees, +90 degrees, or −90degrees.

Meanwhile, a left protrusion 42L may be positioned between the centerand the left side of the front bracket 42, and may protrude in the reardirection from the front bracket 42. A right protrusion 42R may bepositioned between the center and the right side of the front bracket42, and may protrude in the rear direction from the front bracket 42. Inaddition, a stopper 43S may protrude upward from the upper side of themount 43F, and may be positioned on the rotation trajectory of the leftprotrusion 42L and the right protrusion 42R. Accordingly, the stopper43S may limit the rotation of the front bracket 42 and the pivot shaft44 to a certain angle.

Referring to FIG. 9 , a holder 47 may be positioned between the leftwing 43L and the right wing 43R. A holder body 470 may cover the reardirection of the mount 43F of the rear bracket 43. A first part 47L mayprotrude toward the mount 43F from a left side portion of the holderbody 470, and may be adjacent to the left wing 43L. A second part 47R(see FIG. 7 ) may protrude from a right side portion of the holder 47toward the mount 43F, and may be adjacent to the right wing 43R.

A tilt shaft 46 may extend in the left-right direction. The tilt shaft46 may penetrate the left wing 43L, the first part 47L, the second part47R, and the right wing 43R. A head (no reference numeral) that is oneend of the tilt shaft 46 may be seated on a side surface of the leftwing 43L. The other end of the tilt shaft 46 may be threaded, and afastening member 46 d such as a nut may be fastened to the other end ofthe tilt shaft 46 on the right wing 43R.

In addition, the tilt shaft 46 may have a cylindrical shape as a whole,and may be fixed to the left wing 43L and the right wing 43R. The tiltshaft 46 may be rotatably coupled to the holder 47. That is, the tiltshaft 46 may provide a tilt axis. At least one washer 46 v may bepositioned between the second part 47R and the right wing 43R, and mayhave a circular hole through which the tilt shaft 46 passes.

An elastic member 46 b may be positioned between the left wing 43L andthe right wing 43R. The elastic member 46 b may be wound around theouter circumference of the tilt shaft 46 a plurality of times, and mayhave elasticity. The elastic member 46 b may be a coil-shaped spring.

In addition, a portion 46 b of the elastic member 46 a may extend in adirection intersecting the tilt shaft 46 without being wound around thetilt shaft 46. A seating portion 43 h may protrude in the rear directionfrom the lower side of the mount 43F of the rear bracket 43, and may beadjacent to the left wing 43L. The seating portion 43 h may have agroove into which a portion of the elastic member 46 a is inserted. Thatis, a portion of the elastic member 46 a may be caught in the groove ofthe seating portion 43 h.

In addition, one end of the elastic member 46 a may be formed in theabove mentioned portion 46 b. A disc spring 46 w may be adjacent to theother end 46 c of the elastic member 46 a, and may be positioned betweenthe elastic member 46 a and the second part 47R. The disc spring 46 wmay have a circular hole (no reference numeral) through which the tiltshaft 46 passes. The disc spring 46 w may have elasticity and may beconvex in a direction toward the elastic member 46 a. The disc spring 46w may generate an elastic force in the axial direction of the tilt shaft46. The washer 46 u may be positioned between the disc spring 46 w andthe second part 47R, and may have a circular hole through which the tiltshaft 46 passes.

Accordingly, the tilt shaft 46 may rotate together with the rear bracket43, the front bracket 42, and a plurality of members 45 c 5, 45 c 4, 45c 3, 45 c 2, 45 c 1, 43Fw, 45 a, and 44. In response to the rotation ofthe tilt shaft 46, the head 10 (see FIG. 5 ) fixed to the front bracket42 may be tilted up or down. In this case, the elastic member 46 a mayprovide a force for supporting the head 10 inclined at a certain angle.In addition, the disc spring 46 w may add a force for maintaining theangle of the head 10 inclined at a certain angle, as long as an externalforce greater than or equal to a certain level is not applied.

For example, the head 10 may be tilted within the range of +25 degreesto −25 degrees. In addition, due to the elastic force of theabove-described elastic member 46 a and the disc spring 46 w, the head10 may maintain a certain tilt angle, as long as an external forcegreater than or equal to a certain level is not applied.

Meanwhile, a pin 47P may be fixed to the first part 47L and/or thesecond part 47R. For example, the pin 47P may protrude to the left fromthe side surface of the first part 47L.

In this case, the guide groove 43 g may be formed while being depressedin the front direction from the rear end of the left wing 43L. Areference point 43 ga may contact the pin 47P in a state in which thehead 10 (see FIG. 5 ) is not inclined up or down. An up groove 43 gb maybe formed by drawing an arc in a first rotation direction from thereference point 43 ga. A down groove 43 gc may be formed by drawing anarc from the reference point 43 ga in a second rotation directionopposite to the first rotation direction.

Here, the tilt shaft 46 may rotate in the first rotation direction orthe second rotation direction. When the tilt shaft 46 rotates in thefirst rotation direction, the pin 47P may relatively move on the downgroove 43 gc. The rotation of the tilt shaft 46 may be limited as thedown groove 43 gc is caught by the pin 47P. When the tilt shaft 46rotates in the second rotation direction, the pin 47P may relativelymove on the up groove 43 gb. The rotation of the tilt shaft 46 may belimited as the up groove 43 gb is caught by the pin 47P.

Accordingly, a maximum angle at which the head 10 can be tilted upwardmay be determined according to the length of the up groove 43 gb. Inaddition, a maximum angle at which the head 10 can be tilted downwardmay be determined according to the length of the down groove 43 gc. Forexample, the head 10 may be tilted within the range of +25 degrees to−25 degrees.

Referring to FIG. 10 , a first rotation unit 48 may be positioned in therear direction of the holder 47. A first connection portion 471 mayconnect the holder 47 and the first rotation unit 48. For example, theholder 47, the first connection portion 471, and the first rotation unit48 may be formed as one body.

A cable holder 49 may be positioned in the rear direction of the frontbracket 42, and may be penetrated by the rear bracket 43 and the holder47. The cable holder 49 may be coupled to the left wing 43L and theright wing 43R through a fastening member such as a screw. A first plate49 a and a second plate 49 b may have a ring shape as a whole, and maybe spaced apart from each other in the front-rear direction.Accordingly, a cable (not shown) may be wound around the cable holder 49at between the first plate 49 a and the second plate 49 b.

Referring to FIGS. 11 and 12 , as described above, the front bracket 42may be detachably coupled to the fixing plate 41 a (see FIG. 5 ).

A cover 40 c 1 may cover the rear direction of the cable holder 49, andthe first rotation unit 48 may pass therethrough (see 40 h in FIG. 12 ).A fastening member 49 f 1, 49 f 2 may penetrate the cable holder 49 toprotrude in the rear direction, and may be coupled to the inner side ofthe cover 40 c 1. For example, the fastening member 49 f 1, 49 f 2 maybe a screw or a bolt.

Referring to FIGS. 13 and 14 , the arm 50 may include arm body 51, 52.The arm body 51, 52 may extend in a direction inclined upward by acertain angle (acute angle) with respect to a horizontal plane. The armbody 51, 52 may extend parallel to the horizontal plane. For example, anupper arm body 51 and a lower arm body 52 may be coupled to each otherin a vertical direction. As another example, the upper arm body 51 andthe lower arm body 52 may be formed as one body. The arm 50 may bereferred to as a rod 50 or a link 50.

A front portion of the upper arm body 51 may be spaced upward from afront portion of the lower arm body 52. A front groove 50 g 1 may beformed in the front portion of the arm body 51, 52 and may have a “U”shape that is opened in the front direction. A rear portion of the upperarm body 51 may be spaced upward from a rear portion of the lower armbody 52. A rear groove 50 g 2 may be formed in the rear portion of thearm body 51, 52, and may have a “U” shape that is opened in the reardirection.

An upper insertion hole 51 a may be formed to vertically penetrate thefront portion of the upper arm body 51, and may face the front groove 50gi. An upper fastening hole 51 b may be formed to vertically penetratethe rear portion of the upper arm body 51, and may face the rear groove50 g 2.

A lower fastening hole 52 a may be formed to vertically penetrate thefront portion of the lower arm body 52, and may be aligned with theupper insertion hole 51 a. A lower insertion hole 52 b may be formed tovertically penetrate the rear portion of the lower arm body 52, and maybe aligned with the upper fastening hole 51 b.

Meanwhile, a cable groove 50 c may be formed on the lower surface of thelower arm body 52, and may extend along the length direction of thelower arm body 52. The cable C (see FIG. 19 ) may be positioned in thecable groove 50 c.

Meanwhile, a portion of the upper surface of the upper arm body 51 mayhave a recessed shape. In this case, a plurality of ribs 51 r may beprovided in the portion of the upper surface of the upper arm body 51.Accordingly, the rigidity of the arm body 51, 52 can be secured whilereducing the weight of the arm body 51, 52.

Referring to FIG. 15 , a cover ring 40 c 2 may extend along thecircumference of the cover 40 c 1, and may be detachably coupled to thefixing ring 41 b (see FIG. 11 ).

An upper cover 53 may cover the surface of the upper arm body 51 (seeFIG. 14 ). A lower cover 54 may cover the surface of the lower arm body52 (see FIG. 14 ). The upper cover 53 and the lower cover 54 may beformed separately, or may be formed as one body.

The first rotation unit 48 may be inserted into the front groove 50 g 1,and may be rotatably coupled to the arm 50. The second rotation unit 68may be inserted into the rear groove 50 g 2, and may be rotatablycoupled to the arm 50. Meanwhile, the second rotation unit 68 mayprotrude from a vertical member 61 described later toward the reargroove 50 g 2.

Referring to FIGS. 15 and 16 , the first rotation unit 48 may include afirst body 480, a first fastening member 48 a, a first upper fixingwasher 48 b, a first disc spring 48 d, a first upper washer 48 e, afirst upper bushing 48 f, a first lower bushing 48 g, a first lowerwasher 48 h, and a first lower fixing washer 48 c. The first rotationunit 48 may be referred to as a first swivel unit 48 or a first swivelmodule 48.

The first body 480 may be opened vertically. The first body 480 may havea donut shape as a whole. For example, the first body 480 may be formedas one body with the first connection portion 471. The first body 480may be inserted into the front groove 50 g 1.

The first fastening member 48 a may extend in a vertical direction. Thefirst fastening member 48 a may be inserted into the arm 50 through theupper insertion hole 51 a (see FIG. 14 ), and may penetrate a hole 480 hformed in the center of the first body 480. A head 48 ah of the firstfastening member 48 a may be positioned inside the upper arm body 51.The first fastening member 48 a may be screwed into the lower fasteninghole 52 a (see FIG. 14 ).

The first upper fixing washer 48 b may be positioned in the lower sideof the head 48 ah of the first fastening member 48 a, and may bepenetrated by the first fastening member 48 a. The first upper fixingwasher 48 b may be fixed to the inner side of the upper arm body 51. Forexample, the first upper fixing washer 48 b may be a toothed lockwasher. A tooth 48 bt of the first upper fixing washer 48 b may beinserted and coupled to a groove (no reference numeral) formed in theinner side of the upper arm body 51.

The first disc spring 48 d may be positioned in the lower side of thefirst upper fixing washer 48 b. The first disc spring 48 d may haveelasticity, and may be convex toward the first upper fixing washer 48 b.The first disc spring 48 d may generate an elastic force in the axialdirection of the first fastening member 48 a.

The first upper washer 48 e may be positioned in the lower side of thefirst disc spring 48 d, and may be penetrated by the first fasteningmember 48 a. The first upper washer 48 e may have a ring shape.

The first upper bushing 48 f may be opposite to the first disc spring 48d with respect to the first upper washer 48 e. The first fasteningmember 48 a may penetrate the first upper bushing 48 f. The first upperbushing 48 f may have a cylindrical shape in which a flange (noreference numeral) is formed in an upper end. The flange of the firstupper bushing 48 f may contact on the first upper groove 480 a formedalong the circumference of the hole 480 h in the upper surface of thefirst body 480. A portion (no reference numeral) of the first upperbushing 48 f may be inserted into the hole 480 h of the first body 480,may be positioned between the inner circumferential surface of the firstbody 480 and the outer circumferential surface of the first fasteningmember 48 a, and may be in contact with the inner circumferentialsurface of the first body 480 and the outer circumferential surface ofthe first fastening member 48 a.

The first lower bushing 48 g may be opposite to the first upper bushing48 f, and may be spaced downwardly from the first upper bushing 48 f.The first fastening member 48 a may penetrate the first lower bushing 48g. The first lower bushing 48 g may have a cylindrical shape in which aflange (no reference numeral) is formed in a lower end. The flange ofthe first lower bushing 48 g may contact on the first lower groove 480 bformed along the circumference of the hole 480 h in the lower surface ofthe first body 480. A portion (no reference numeral) of the first lowerbushing 48 g may be inserted into the hole 480 h of the first body 480,may be positioned between the inner circumferential surface of the firstbody 480 and the outer circumferential surface of the first fasteningmember 48 a, and may be in contact with the inner circumferentialsurface of the first body 480 and the outer circumferential surface ofthe first fastening member 48 a.

The first lower washer 48 h may be positioned in the lower side of thefirst lower bushing 48 g, and may be penetrated by the first fasteningmember 48 a. The first lower washer 48 h may have a ring shape.

The first lower fixing washer 48 c may be opposite to the first lowerbushing 48 g with respect to the first lower washer 48 h, and may bepenetrated by the first fastening member 48 a. The first lower fixingwasher 48 c may be fixed to the inner side of the lower arm body 52. Forexample, the first lower fixing washer 48 c may be a toothed lockwasher. A tooth 48 ct of the first lower fixing washer 48 c may beinserted and coupled to a groove (no reference numeral) formed in theinner side of the lower arm body 52.

Accordingly, the first body 480 may rotate with respect to the firstfastening member 48 a. That is, the first fastening member 48 a mayprovide a first swivel shaft. In addition, due to the elastic force ofthe first disc spring 48 d described above, the head 10 may maintain acertain swivel angle, as long as an external force greater than or equalto a certain level is not applied.

Meanwhile, the first groove 48 g may be formed along the circumferentialdirection of the first body 480 in the side surface of the first body480. The first groove 48 g may face the inside of the front groove 50 g1. A first protrusion 511 may protrude from the front groove 50 g 1toward the first groove 48 g, and may be inserted into the first groove48 g. The length of the first protrusion 511 may be smaller than thelength of the first groove 48 g. That is, when the first body 480rotates with respect to the first fastening member 48 a, the firstprotrusion 511 may relatively move along the first groove 48 g. Therotation of the first body 480 may be limited as one end or the otherend of the first groove 48 g is caught by the first protrusion 511.

Accordingly, the maximum angle at which the head 10 can be rotated leftand right may be determined according to the length of the first groove48 g.

Referring to FIGS. 15 and 17 , the second rotation unit 68 may include asecond body 680, a second fastening member 68 a, a second lower fixingwasher 68 b, a second disc spring 68 d, a second lower washer 68 e, asecond lower bushing 68 f, a second upper bushing 68 g, a second upperwasher 68 h, and a second upper fixing washer 68 c. The second rotationunit 68 may be referred to as a second swivel unit 68 or a second swivelmodule 68.

The second body 680 may be opened vertically. The second body 680 mayhave a donut shape as a whole. The second body 680 may be connected tothe vertical member 61 through a second connection portion 611. Forexample, the second body 680, the second connection portion 611, and thevertical member 61 may be formed as one body. The second body 680 may beinserted into the rear groove 50 g 2.

The second fastening member 68 a may extend in a vertical direction. Thesecond fastening member 68 a may be inserted into the arm 50 through thelower insertion hole 52 b (see FIG. 14 ), and may penetrate the hole 680h formed in the center of the second body 680. The head 68 ah of thesecond fastening member 68 a may be positioned in the inner side thelower arm body 52. The second fastening member 68 a may be screwed intothe upper fastening hole 51 b (see FIG. 14 ).

The second lower fixing washer 68 b may be positioned in the upper sideof the head 68 ah of the second fastening member 68 a, and may bepenetrated by the second fastening member 68 a. The second lower fixingwasher 68 b may be fixed to the inner side of the lower arm body 52. Forexample, the second lower fixing washer 68 b may be a toothed lockwasher. A tooth 68 bt of the second lower fixing washer 68 b may beinserted and coupled to a groove (no reference numeral) formed in theinner side of the lower arm body 52.

The second disc spring 68 d may be positioned in the upper side of thesecond lower fixing washer 68 b. The second disc spring 68 d may haveelasticity, and may be convex toward the second lower fixing washer 68b. The second disc spring 68 d may generate an elastic force in theaxial direction of the second fastening member 68 a.

The second lower washer 68 e may be positioned in the upper side of thesecond disc spring 68 d, and may be penetrated by the second fasteningmember 68 a. The second lower washer 68 e may have a ring shape.

The second lower bushing 68 f may be opposite to the second disc spring68 d with respect to the second lower washer 68 e. The second fasteningmember 68 a may penetrate the second lower bushing 68 f. The secondlower bushing 68 f may have a cylindrical shape in which a flange (noreference numeral) is formed in the lower end. The flange of the secondlower bushing 68 f may contact on the second lower groove 680 a formedalong the circumference of the hole 680 h in the lower surface of thesecond body 680. A portion (no reference numeral) of the second lowerbushing 68 f may be inserted into the hole 680 h of the second body 680,may be positioned between the inner circumferential surface of thesecond body 680 and the outer circumferential surface of the secondfastening member 68 a, and may be in contact with the innercircumferential surface of the second body 680 and the outercircumferential surface of the second fastening member 68 a.

The second upper bushing 68 g may be opposite to the second lowerbushing 68 f, and may be upwardly spaced from the second lower bushing68 f. The second fastening member 68 a may penetrate the second upperbushing 68 g. The second upper bushing 68 g may have a cylindrical shapein which a flange (no reference numeral) is formed in an upper end. Theflange of the second upper bushing 68 g may contact on the second uppergroove 680 b formed along the circumference of the hole 680 h in theupper surface of the second body 680. A portion (no reference numeral)of the second upper bushing 68 g may be inserted into the hole 680 h ofthe second body 680, may be positioned between the inner circumferentialsurface of the second body 680 and the outer circumferential surface ofthe second fastening member 68 a, and may be in contact with the innercircumferential surface of the second body 680 and the outercircumferential surface of the second fastening member 68 a.

The second upper washer 68 h may be positioned in the upper side of thesecond upper bushing 68 g, and may be penetrated by the second fasteningmember 68 a. The second upper washer 68 h may have a ring shape.

The second upper fixing washer 68 c may be opposite to the second upperbushing 68 g with respect to the second upper washer 68 h, and may bepenetrated by the second fastening member 68 a. The second upper fixingwasher 68 c may be fixed to the inner side of the upper arm body 51. Forexample, the second upper fixing washer 68 c may be a toothed lockwasher. A tooth 68 ct of the second upper fixing washer 68 c may beinserted and coupled to a groove (no reference numeral) formed in theinner side of the upper arm body 51.

Accordingly, the second body 680 may rotate with respect to the secondfastening member 68 a. That is, the second fastening member 68 a mayprovide a second swivel shaft. In addition, due to the elastic force ofthe above-described second disc spring 68 d, the head 10 can maintain acertain swivel angle, as long as an external force greater than or equalto a certain level is not applied.

Meanwhile, the second groove 68 g may be formed along thecircumferential direction of the second body 680 in the side surface ofthe second body 680. The second groove 68 g may face inward of the reargroove 50 g 2. The second protrusion 512 may protrude from the reargroove 50 g 2 toward the second groove 68 g, and may be inserted intothe second groove 68 g. The length of the second protrusion 512 may besmaller than the length of the second groove 68 g. That is, when thesecond body 680 rotates with respect to the second fastening member 68a, the second protrusion 512 may relatively move along the second groove68 g. The rotation of the second body 680 may be limited as one end orthe other end of the second groove 68 g is caught by the secondprotrusion 512.

Accordingly, the maximum angle at which the head 10 can be rotated leftand right may be determined according to the length of the second groove68 g.

Referring to FIG. 18 , the arm 50 may extend in a direction intersectingthe head 10 and the pole 30. The arm 50 may connect the articulatedconnector 40 and the elevating module 60. The second rotation unit 68 ofthe elevating module 60 and the vertical member 61 may be connectedthrough the second connection portion 611. The second connection portion611 may penetrate the pole 30.

The vertical member 61 may extend in the length direction of the pole30. The vertical member 61 may be accommodated in the pole 30. Apartition wall 61 w may be adjacent to the upper end of the verticalmember 61.

The pole 30 may extend in a vertical direction, and surround thevertical member 61. A plurality of ribs 30 a, 30 b, 30 c, and 30 d maybe positioned between the pole 30 and the vertical member 61, and may bespaced apart from each other in the circumferential direction of thepole 30. The first rib 30 a, the second rib 30 b, the third rib 30 c,and the fourth rib 30 d may be positioned in a vertex of an arbitraryrectangle inside the pole 30.

In addition, the lower end 31 of the pole 30 may be inserted and coupledto a port 21 formed in the upper surface of the base 20. For example,the port 21 may have a monticule shape.

Referring to FIGS. 19 and 20 , the vertical member 61 may have acylindrical shape cut in half as a whole. The rear and lower sides ofthe vertical member 61 may be opened, and the upper side may be blockedby the partition wall 61 w.

The upper shaft 62 may extend in the length direction of the verticalmember 61. The upper shaft 62 may have a cylindrical shape with an upperside blocked. At least a portion of the upper shaft 62 may beaccommodated in the vertical member 61. A protrusion 62 a may protrudeupward from the upper side of the upper shaft 62, and may penetrate thepartition wall 61 w. A fastening member 62 b such as a nut may bescrewed to the protrusion 62 a on the partition wall 61 w. Accordingly,the upper shaft 62 may be detachably coupled to the vertical member 61.

A cap 69T may be fitted on the upper end of the vertical member 61, andmay be flat. A mount 69M may be positioned on the cap 69T, and may befastened to the plurality of ribs 30 a, 30 b, 30 c, 30 d (see FIG. 18 )through the vertical fastening member 69F1. A handle body 39 a of thehandle 39 may be opposite to the cap 69T with respect to the mount 69M,and may be fastened to the mount 69M through a horizontal fasteningmember 69F2. The handle body 39 a may have a track shape as a whole, andmay be covered by a handle cover 39 b (see FIG. 2 ).

Referring to FIG. 21 , a stem 63 s may extend in a vertical directionand may be aligned with the vertical member 61. The lower end of thestem 63 s may be inserted into the port 21 of the base 20.

A gas spring 62, 63 may include the above-described upper shaft 62 and alower shaft 63 connected to the upper shaft 62 in an up-down direction.The lower shaft 63 may extend in the length direction of the upper shaft62, and may have a smaller diameter than the upper shaft 62. That is,the lower shaft 63 may be inserted into the upper shaft 62. The lowerend of the lower shaft 63 may be fixed on the stem 63 s.

A clamp 64, 65 may be opposite to the vertical member 61 with respect tothe upper shaft 62. In other words, the upper shaft 62 may be positionedbetween the vertical member 61 and the clamp 64, 65. For example, theclamp 64, 65 may be provided in plurality. For example, the first clamp64 and the second clamp 65 may be spaced apart from each other in theup-down direction.

The first clamp 64 may include a first semi-cylinder 640, a first leftflange 641, and a first right flange 642. The first semi-cylinder 640may contact the outer circumference of the upper shaft 62. The firstleft flange 641 may extend from one side of the first semi-cylinder 640to the left, and may be coupled to a first portion 61 s 1 of thevertical member 61 through a fastening member 64F. The first rightflange 642 may extend from the other side of the first semi-cylinder 640to the right, and may be coupled to a second portion 61 s 2 of thevertical member 61 through a fastening member (not shown).

The second clamp 65 may include a second semi-cylinder 650, a secondleft flange 651, and a second right flange 652. The second semi-cylinder650 may contact the outer circumference of the upper shaft 62. Thesecond left flange 651 may extend from one side of the secondsemi-cylinder 650 to the left, and may be coupled to a third portion 65s 1 of the vertical member 61 through the fastening member 65F. Thesecond right flange 652 may extend from the other side of the secondsemi-cylinder 640 to the right, and may be coupled to a fourth portion(not shown) of the vertical member 61 through a fastening member (notshown).

Accordingly, the upper shaft 62 may be detachably coupled to thevertical member 61. In addition, the upper shaft 62 can move down or upalong the lower shaft 63.

Referring to FIGS. 21 and 22 , a roller 66 a, 66 b, 67 a, 67 b may beadjacent to the clamp 64, 65. For example, a first roller 66 a, 66 b maybe adjacent to the first clamp 64, and a second roller 67 a, 67 b may beadjacent to the second clamp 65.

The first roller 66 a, 66 b may include a first left roller 66 a and afirst right roller 66 b. A body 66 a 1 a of a first left pin 66 a 1 maypenetrate the first left roller 66 a and a left side portion 61L of thevertical member 61. A flange 66 a 1 b of the first left pin 66 a 1 maybe positioned between the first left roller 66 a and the left sideportion 61L. The first left roller 66 a may be coupled to the left sideportion 61L through the first left pin 66 a 1. A body 66 b 1 a of afirst right pin 66 b 1 may penetrate the first right roller 66 b and aright side portion 61R of the vertical member 61. A flange 66 b 1 b ofthe first right pin 66 b 1 may be positioned between the first rightroller 66 b and the right side portion 61R. Accordingly, the first rightroller 66 b may be coupled to the right side portion 61R through thefirst right pin 66 b 1.

For example, the second roller 67 a, 67 b may have the same shape as thefirst roller 66 a, 66 b. That is, the contents described above withrespect to the first rollers 66 a and 66 b may be equally applied to thesecond rollers 67 a and 67 b. Accordingly, the second left roller 67 amay be coupled to the left side portion 61L, and the second right roller67 b may be coupled to the right side portion 61R.

In addition, the left roller 66 a, 67 a may be positioned between athird rib 30 c and a fourth rib 30 d, and may be in contact with thethird rib 30 c and the fourth rib 30 d. The right roller 66 b, 67 b maybe positioned between a first rib 30 a and a second rib 30 b, and may bein contact with the first rib 30 a and the second rib 30 b. For example,the roller 66 a, 66 b, 67 a, 67 b may have an oil groove through which afluid such as oil flows. For example, the roller 66 a, 66 b, 67 a, 67 bmay include a Poly Oxy Methylene (POM) material.

Accordingly, the vertical member 61 can be smoothly raised or loweredinside the pole 30 by the roller 66 a, 66 b, 67 a, 67 b.

Referring to FIGS. 21 and 23 , the first left flange 641 of the firstclamp 64 may be positioned between the third rib 30 c and the fourth rib30 d. The first right flange 642 of the first clamp 64 may be positionedbetween the first rib 30 a and the second rib 30 b. The first clamp 64may include a first center protrusion 64 a, a first left protrusion 64b, and a first right protrusion 64 c.

The first center protrusion 64 a may protrude from the firstsemi-cylinder 650 toward the inner side of the pole 30, and may contactthe inner side of the pole 30. For example, a plurality of first centerprotrusions 64 a may be spaced apart from each other, and may beparallel to each other. The first left protrusion 64 b may protrude fromthe first left flange 641 toward the third rib 30 c, and may contact thethird rib 30 c. The first right protrusion 64 c may protrude from thefirst right flange 642 toward the second rib 30 b, and may contact thesecond rib 30 b. Accordingly, the first center protrusion 64 a, thefirst left protrusion 64 b, and the first right protrusion 64 c maycause friction between the vertical member 61 and the pole 30.

For example, the second clamp 65 may be spaced downward from the firstclamp 64, and may have the same shape as the first clamp 64. That is,the above description of the first clamp 64 may be identically appliedto the second clamp 65. Accordingly, the second center protrusion 65 a,the second left protrusion 65 b, and the second right protrusion 65 c ofthe second clamp 65 may cause friction between the vertical member 61and the pole 30.

Accordingly, the position (height) of the vertical member 61 withrespect to the base 20 may be uniformly maintained by a friction forcebetween the protrusion 64 a, 64 b, 64 c, 65 a, 65 b, 65 c and the pole30, as long as an external force greater than or equal to a certainlevel is not applied.

Meanwhile, the length of the left protrusion 64 b, 65 b and the rightprotrusion 64 c, 65 c may be smaller than the length of the centerprotrusion 64 a, 65 a. Accordingly, the pole 30 may include a pluralityof ribs 30 a, 30 b, 30 c, and 30 d, and the rigidity of the pole 30 maybe sufficiently secured.

Referring back to FIGS. 22 and 23 , a cable groove 61 g may be formed ina front portion 61F of the vertical member 61, and may be formed to beelongated in the vertical direction. A cable C may be inserted into thecable groove 61 g. The cable C may be disposed along the cable groove 50c (see FIG. 14 ) of the arm 50, and may be electrically connected to thehead 10. In addition, the cable C may be disposed along the stem 63 s(see FIG. 21 ), and may be electrically connected to electroniccomponents such as a battery Bt (see FIG. 1 ) disposed inside the base20.

Referring to FIG. 24 , the head 10 may be spaced upwardly from the base20. A user may pivot the head 10. In this case, a pivot axis may passthrough the center of the head 10 and may be orthogonal to the head 10.Referring to the left drawing of FIG. 24 , the head 10 may be placed ina landscape mode. Referring to the right drawing of FIG. 24 , the head10 may be placed in a portrait mode.

Referring to FIG. 25 , a user may tilt the head 10. In this case, thetilt axis may be a horizontal axis which is positioned in the reardirection of the center of the head 10 and parallel to the head 10. Auser may swivel the head 10. In this case, a first swivel axis may be avertical axis adjacent to one end of the arm 50. Alternatively, a secondswivel axis may be a vertical axis adjacent to the other end of the arm50. A user may raise or lower the head 10 from the pole 30. At thistime, the minimum height and the maximum height of the head 10 may beformed by engaging the arm 50 into the hole 30 hh formed in the pole 30.

The above-described pivoting, tilting, swiveling, and elevatingoperations of the head 10 may be implemented independently of eachother. For example, the head 10 may be pivoted within a range of +90degrees to −90 degrees. For example, the head 10 may be tilted withinthe range of +25 degrees to −25 degrees. For example, the head 10 may beswiveled within a range of +65 to −65 degrees. For example, the head 10may be positioned at 1,065 to 1,265 mm from the base 20 or the ground,based in a landscape mode.

Referring to FIG. 26 , a cradle 90 may include a front part 91, a middlepart 92, and a rear part 93. The middle part 92 may be positioned in therear direction of the front part 91, and may be coupled to the frontpart 91. The rear part 93 may be opposite to the front part 91 withrespect to the middle part 92, and may be coupled to the middle part 92.

Referring to FIGS. 27 and 28 , the front part 91 may include a firstpart 91 a, a second part 91 b, and a third part 91 c. The front surfaceof the first part 91 a may have a shape corresponding to the rearsurface of a portion adjacent to the circumference of the back cover 15among the rear surface of the back cover 15 (see FIG. 2 ). The frontsurface of the first part 91 a may be curved. The second part 91 b maybe bent in the front direction from the upper end of the first part 91a. The angle between the second part 91 b and the first part 91 a may bean obtuse angle. The third part 91 c may be bent downward from the frontend of the second part 91 b. The angle between the third part 91 c andthe second part 91 b may be a right angle or slightly greater than 90degrees. Accordingly, the first part 91 a may have a shape in which aportion of an upper portion of the curved disc is cut off, and thesecond part 91 b and the third part 91 c may have a hook shape as awhole.

At least one magnet 91M may be coupled to the first part 91 a. Forexample, a first magnet 91M1, a second magnet 91M2, and a third magnet91M3 may be seated in a groove formed on the rear surface of the firstpart 91 a. Preferably, a plurality of magnets 91M1, 91M2, and 91M3 maybe symmetrically disposed in the first part 91 a.

A support portion 91V may be adjacent to the upper end of the first part91, and may protrude in the rear direction from the rear surface of thefirst part 91. The support portion 91V may extend in the left-rightdirection. A left fixing pin 91P1 may be fixed to one end of the supportportion 91V, and a right fixing pin 91P2 may be fixed to the other endof the support portion 91V. A reinforcing portion 91S1 may have a hookshape, and may be inserted into the support portion 91V. For example, asingle reinforcing portion 91S1 may extend long in the left-rightdirection along the support portion 91V. For another example, one of apair of reinforcing portions 91S1 may be adjacent to the left fixing pin91P1, and the other may be adjacent to the right fixing pin 91P2.

Referring to FIG. 29 , the middle part 92 may be seated on the rearsurface of the first part 91 a. The middle part 92 may have a shapecorresponding to the first part 91 a, and may be penetrated by thesupport portion 91V. In this case, the left fixing pin 91P1 (see FIG. 28) may be inserted into one side of the middle part 92, and the rightfixing pin 91P2 (see FIG. 28 ) may be inserted into the other side ofthe middle part 92. Accordingly, the middle part 92 may be coupled tothe front part 91. Meanwhile, the first left cover pin 92P1 may bealigned with the left fixing pin 91P1, and may close a hole formed inone side of the middle part 92. In addition, the first right cover pin92P2 may be aligned with the right fixing pin 91P2, and may close a holeformed in the other side of the middle part 92.

An axis holder 92A, 92B may protrude the rear direction from the lowerportion of the middle part 92. For example, the axis holder 92A, 92B mayinclude a first axis holder 92A and a second axis holder 92B that arespaced apart from each other in the left-right direction.

The first axis holder 92A may include a first insertion portion 92 a 1having a first insertion hole 92 a 2 and a first fixing portion 92 a 3having a first fixing hole 92 a 4. The first fixing member 92 a 5 suchas a nut may be fixed to the inner side of the first fixing portion 92 a3 and may be aligned with the first fixing hole 92 a 4 and the firstinsertion hole 92 a 2.

The second axis holder 92B may include a second insertion portion 92 b 1having a second insertion hole 92 b 2 and a second fixing portion 92 b 3having a second fixing hole 92 b 4. The second fixing member 92 b 5 suchas a nut may be fixed to the inner side of the second fixing portion 92b 3 and may be aligned with the second fixing hole 92 b 4 and the secondinsertion hole 92 b 2.

For example, the second axis holder 92B and the first axis holder 92Amay be symmetrical.

A fixing pin 92S1, 92S2 may protrude in the rear direction from thelower portion of the middle part 92. The fixing pin 92S1, 92S2 may beadjacent to the axis holder 92A, 92B. For example, the fixing pin 92S1,92S2 may include a first fixing pin 92S1 and a second fixing pin 92S2spaced apart from each other in the left-right direction.

The first fixing pin 92S1 may be adjacent to the first axis holder 92A,and may protrude in the rear direction from the rear surface of themiddle part 92. The second fixing pin 92S2 may be adjacent to the secondaxis holder 92B, and may protrude in the rear direction from the rearsurface of the middle part 92. For example, the second fixing pin 92S2may have the same shape as the first fixing pin 92S1.

Referring to FIGS. 29 and 30 , the rear part 93 may be positioned in therear direction of the middle part 92, and may face the middle part 92.

A leaf 93A, 93B may protrude from the lower portion of the rear part 93toward the middle part 92. The leaf 93A, 93B may be positioned betweenthe insertion portion 92 a 1, 92 b 1 and the fixing portion 92 a 3, 92 b3 of the axis holder 92A, 92B. A fastening member 93F1, 93F2 such as abolt may penetrate the insertion portion 92 a 1, 92 b 1, the leaf 93A,93B, and the fixing portion 92 a 3, 92 b 3, and may be fastened to thefixing member 92 a 5, 92 b 5. For example, the leaf 93A, 93B may includea first leaf 93A that is penetrated by a first fastening member 93F1 atbetween the first insertion portion 92 a 1 and the first fixing portion92 a 3, and a second leaf 93B that is penetrated by a second fasteningmember 93F2 at between the second insertion portion 92 b 1 and thesecond fixing portion 92 b 3.

Accordingly, the rear part 93 may rotate with respect to the fasteningmember 93F1, 93F2. That is, the fastening member 93F1, 93F2 may providea hinge axis of the rear part 93.

An elastic member 93S1, 93S2 may have elasticity, and may extend in thelength direction of the fixing pin 92S1, 92S2. The fixing pin 92S1, 92S2may be inserted into the elastic member 93S1, 93S2. One end of theelastic member 93S1, 93S2 may be fixed to the middle part 92, and theother end of the elastic member 93S1, 93S2 may be fixed to the rear part93. For example, the elastic member 93S1, 93S2 may be a spring. Forexample, the elastic member 93S1 may include a first elastic member 93S1wound around the outer circumference of the first fixing pin 92S1 and asecond elastic member 93S2 wound around the outer circumference of thesecond fixing pin 92S2.

Meanwhile, the left portion 93L of the rear part 93 may have a firsthole through which the first fastening member 93F1 passes, and a firstcover pin 93P1 may close the hole. In addition, the right portion 93R ofthe rear part 93 may have a second hole through which the secondfastening member 93F2 passes, and a second cover pin (not shown) mayclose the second hole.

Referring to FIGS. 26 and 31 , when the rear part 93 may rotateclockwise with respect to the above-described hinge axis 93F1, 93F2 byan external force applied to the rear part 93, the elastic member 93S1,93S2 may be compressed and elastically deformed. That is, when theexternal force applied to the rear part 93 is released, the elasticmember 93S1, 93S2 may be extended and restored, and may rotatecounterclockwise with respect to the above-described hinge axis 93F1,93F2 by the elastic force of the elastic member 93S1, 93S2.

Referring to FIG. 26 , in the initial state of the cradle 90, the upperportion of the rear part 93 may be in contact with contact or adjacentto the middle part 92.

Referring to FIG. 31 , a user may rotate the rear part 93 clockwise withrespect to the above-described hinge axis 93F1, 93F1, and may insert aterminal Mo such as a smartphone into between the middle part 92 and therear part 93. In this case, the rear part 93 may press the terminal Moto the middle part 92 by the elastic force of the elastic member 9351,93S2. Accordingly, the terminal Mo may be stably fixed to the cradle 90.

Meanwhile, a middle pad 92V may protrude in the rear direction from therear surface of the middle part 92. In addition, the rear pad 93V mayprotrude in the front direction from the rear part 93. A pad 92V, 93Vmade of a cushioning material such as rubber or silicon may alleviate animpact applied to the terminal Mo or minimize the occurrence ofscratches on the terminal Mo by the cradle 90.

Referring back to FIGS. 1 and 2 , a hook 91 b, 91 c of the cradle 90 maybe caught on the end frame 14. Specifically, the third part 91 c of thefront part 91 may be caught on the horizontal portion 14H (see FIG. 3 )of the end frame 14, the second part 91 b may be positioned on thevertical portion 14V (see FIG. 3 ) of the end frame 14, and the firstpart 91 a may be positioned on the rear surface of the back cover 15.Accordingly, the cradle 90 may be detachably coupled to thecircumference of the head 10.

Referring to FIG. 32 , the cradle 90 may be coupled to any point on thecircumference of the head 10. In addition, the cradle 90 may be morestrongly coupled to the head 10 by using the magnetic force of theaforementioned magnet 91M (see FIG. 27 ). For example, a position atwhich the cradle 90 is coupled to the head 10 by using the abovemagnetic force may correspond to a position of a plate 16 describedlater.

At least one plate 16 may be positioned between the frame 13 (see FIG. 3) and the back cover 15, and may be coupled to the frame 13 and/or theback cover 15. The plate 16 may be made of a magnetic substance such asiron Fe. The plate 16 may be formed flat, or may be curved along thecurvature of the first part 91 a (see FIG. 28 ) of the cradle 90. Forexample, the plate 16 may be provided in plurality.

A first plate 16 a and a second plate 16 b may be adjacent to the upperside of the head 10, and may be spaced apart from each other in theleft-right direction. For example, the first plate 16 a may bepositioned in the left side of a vertical line VL passing through acenter O of the head 10, and the second plate 16 b may be positioned inthe right side of the vertical line VL. A third plate 16 c may beadjacent to the left side of the head 10, and a fourth plate 16 d may beadjacent to the right side of the head 10. For example, the third plate16 c and the fourth plate 16 d may be positioned on a horizontal line HLpassing through the center O of the head 10 or slightly offset upward ordownward therefrom.

Accordingly, at the position of the plate 16, the cradle 90 may be morestrongly coupled to the head 10 by the magnetic attraction between themagnet 91M (see FIG. 27 ) and the plate 16.

Meanwhile, a gyro sensor 17 may be mounted on the frame 13 at betweenthe frame 13 and the back cover 15. For example, the display device mayinclude one gyro sensor 17. For example, the gyro sensor 17 may bepositioned apart from the vertical line VL and the horizontal line HL.As another example, the display device may include a plurality of gyrosensors 17. The sensing value of the gyro sensor 17 may vary accordingto a pivot angle of the head 10. Accordingly, the gyro sensor 17 maydetect a pivot of the head 10 and a mode (ex., a landscape mode or aportrait mode) of the head 10.

Referring to FIGS. 33 and 34 , a controller of the display device maydetect a landscape mode (see the left drawing of FIG. 34 ) or a portraitmode (see the right drawing of FIG. 34 ) of the head 10, based oninformation obtained from the gyro sensor 17 (see FIG. 32) (S10).

The controller may adjust the aspect ratio of the image according to thelandscape mode or the portrait mode of the head 10, and may output animage through the display panel 11 (S11).

Referring to FIG. 35 , the controller C0 of the display device maycontrol the operation of the display device. The controller C0 may beelectrically connected to components of the display device.

The display panel 11, a main board Mb, a power supply board Pu, and aTiming Controller board (T-CON board) Tc may be electrically connectedto the controller C0. The main board Mb, the power supply board Pu, andthe T-CON board Tc may be mounted on the rear surface of the frame 13(see FIG. 3 ). The main board Mb may control the display device. Thecontroller C0 may be implemented as the main board MB or may be ahigher-order control unit that controls the main board Mb or the like.The power supply board Pu may receive power from a battery Bt (see FIG.1 ) and/or an external power source through a cable, and may providepower to each component of the display device. The T-CON board Tc mayprovide an image signal to the display panel 110.

A speaker SPK may be electrically connected to the controller C0. Thespeaker SPK may be installed in the head 10, the pole 30, the arm 50,and/or the base 20, and may provide sound.

The gyro sensor 17 may be electrically connected to the controller C0.

A communication unit Cm may include a near field communication (NFC)module N1 and/or a Wi-Fi module N2. The NFC module N1 (see FIG. 13 ) maybe mounted in the frame 13 at between the frame 13 and the back cover15, and may be adjacent to the right and lower sides of the head 10. Auser may connect the head 10 and the terminal Mo by tagging the terminalto the NFC module N1. The Wi-Fi module N2 (see FIG. 13 ) may be mountedin the frame 13 at between the frame 13 and the back cover 15, and maybe adjacent to the upper side of the head 10. The head 10 may access thenetwork through the Wi-Fi module N2.

An input unit Pm may be electrically connected to the controller C0. Auser may input a command or signal to the controller C0 through theinput unit Pm. For example, the input unit Pm may be a button Bu, thedisplay panel 11, and/or a microphone Mc. The button Bu (see FIG. 32 )may be mounted in the frame 13 at between the frame 13 and the backcover 15, and may be adjacent to the left side and the lower side of thehead 10. A user may control the head 10 by handling the button Bu. Thedisplay panel 11 may be implemented as a touch type, and a user maycontrol the display device by touching the display panel 11. Themicrophone Mc may be installed in the display device, and a user maycontrol the display device by inputting a voice into the microphone Mc.For example, the input unit Pm may be a remote controller Rc that ishandled by a user and communicates with the display device, or may be anapplication App that is installed in the user's terminal (smartphone)and communicates with the display device.

Referring to FIGS. 35 and 36 , the motor 410 may be coupled to the rearsurface of the frame 13 through a motor mount 410 a. The motor 410 maybe a motor capable of adjusting a rotation direction, a rotation angle,and a rotation speed. The motor 410 may be a step motor.

A worm 413 may be fixed to a rotation shaft 411 of the motor 410 througha coupling member 412, and may rotate together with the rotation shaft411. A worm wheel 414 may be engaged with a thread formed on the outercircumferential surface of the worm 413. The axis of rotation of theworm 413 may be parallel to the left-right direction, and the axis ofrotation of the worm wheel 414 may be parallel to the up-down direction.

A drive shaft 44 s of the pivot shaft 44 may be opposite to the body 44b with respect to the head 44 a, and may be fixed to the worm wheel 414.

Accordingly, when the motor 410 is driven, the pivot shaft 44 may rotatein a first rotation direction or in a second rotation direction oppositeto the first rotation direction. That is, the head 10 (see FIG. 24 ) maybe automatically pivoted.

A disc indicator 418 may be adjacent to a distal end of the worm 413,and may be fixed to the distal end of the worm 413. The disc indicator418 may include a plurality of holes (no reference numeral) that arespaced apart from each other in the circumferential direction of thedisc indicator 418.

A rotation sensor 419 may be adjacent to the disc indicator 418, and maybe fixed to one side of a gear box 410 b mounted in the frame 13 whileaccommodating the worm 413 and the worm wheel 414. The rotation sensor419 may have a horseshoe shape. A light emitting unit and a lightreceiving unit of the rotation sensor 419 face each other but may bespaced apart from each other. The disc indicator 418 may rotate whilepassing between the light emitting unit and the light receiving unitaccording to the rotation of the worm 413. In response to the rotationof the disc indicator 418, the light of the light emitting unit maypenetrate the hole of the disc indicator 418 or be blocked by the discindicator 418.

Accordingly, the rotation sensor 419 may detect the number of rotationsand/or the amount of rotation of the motor 410.

The above-described motor 410 and the rotation sensor 419 may beelectrically connected to the controller C0. That is, the controller C0may control the pivot of the head 10 (see FIG. 24 ) by adjusting theoperation of the motor 410, based on information obtained from therotation sensor 419.

Referring to FIGS. 37 and 38 , a user's terminal Mo may communicate withthe head 10 through a communication unit Cm (see FIG. 35 ). That is, auser tags the terminal Mo to the NFC module N1 (see FIG. 35 ) orconnects the head 10 to a network through the Wi-Fi module N2, so that ascreen of the terminal Mo can be mirrored to the head 10 (S20).

The controller C0 may identify the landscape mode or the portrait modeof the terminal Mo, based on information obtained from the terminal Mothrough the communication unit Cm (S21).

The controller C0 may pivot the head 10 according to the landscape modeor the portrait mode of the terminal Mo (S22). When the terminal Mo isin the landscape mode, the controller C0 may pivot the head 10 in thelandscape mode (see the left drawing of FIG. 38 ) by adjusting therotation of the motor 410 (see FIG. 36 ). When the terminal Mo is in theportrait mode, the controller C0 may pivot the head 10 in the portraitmode (see the right drawing of FIG. 38 ) by adjusting the rotation ofthe motor 410 (see FIG. 36 ).

The controller C0 may adjust the aspect ratio of the image according tothe landscape mode or the portrait mode of the head 10, and may outputan image through the display panel 11 (S23).

Referring to FIGS. 39 to 41 , the controller C0 may recognize theterminal Mo mounted on the head 10 by using the cradle 90, based oninformation obtained from the gyro sensor 16 (see FIG. 32 ) (S30). Thedisplay panel of the terminal Mo may be provided on the front surface ofthe terminal Mo, and a camera My of the terminal Mo may be provided onthe rear surface of the terminal Mo.

The controller C0 may identify the position of the terminal Mo mountedon the head 10, based on the information obtained from the gyro sensor16 (S31).

The controller C0 may pivot the head 10 according to the position of theidentified terminal Mo (S32).

Referring to (a) of FIG. 40 , in the landscape mode of the head 10, whenthe terminal Mo is in a position P1 corresponding to the fourth plate 16d, the controller C0 may convert the head 10 from the landscape mode tothe portrait mode by rotating the head 10 clockwise by 90 degrees. Whenthe terminal Mo is in a position P4 corresponding to the third plate 16c, the controller C0 may convert the head 10 from the landscape mode tothe portrait mode by rotating the head 10 counterclockwise by 90degrees.

Further, in the landscape mode of the head 10, if the terminal Mo is ina position P2 corresponding to the second plate 16 b or a position P3corresponding to the first plate 16 a, the controller C0 can maintainthe landscape mode of the head 10.

Referring to (b) of FIG. 40 , in a first portrait mode of the head 10,the first and second plates 16 a and 16 b may be adjacent to the leftside of the head 10. In the first portrait mode of the head 10, when theterminal Mo is in a position Q1 corresponding to the second plate 16 bor a position Q2 corresponding to the first plate 16 a, the controllerC0 may convert the head 10 from the first portrait mode to the landscapemode by rotating the head 10 counterclockwise by 90 degrees.

In addition, in the first portrait mode of the head 10, when theterminal Mo is in a position Q3 corresponding to the fourth plate 16 d,the controller C0 can maintain the head 10 in the first portrait mode.

Further, in the first portrait mode of the head 10, when the terminal Mois in a position Q4 corresponding to the third plate 16 c, thecontroller C0 may convert the head 10 from the first portrait mode to asecond portrait mode described later by rotating the head 10counterclockwise by 180 degrees.

Referring to (c) of FIG. 40 , in the second portrait mode of the head10, the first and second plates 16 a and 16 b may be adjacent to theright side of the head 10. In the second portrait mode of the head 10,when the terminal Mo is in a position R1 corresponding to the firstplate 16 a or a position R2 corresponding to the second plate 16 b, thecontroller may convert the head 10 from the second portrait mode to thelandscape mode by rotating the head 10 clockwise by 90 degrees.

In addition, in the second portrait mode of the head 10, when theterminal Mo is in a position R3 corresponding to the third plate 16 c,the controller C0 can maintain the second portrait mode of the head 10.

Further, in the second portrait mode of the head 10, when the terminalMo is at the position R4 corresponding to the fourth plate 16 d, thecontroller C0 may convert the head 10 from the second portrait mode tothe first portrait mode by rotating the head 10 clockwise by 180degrees.

The controller C0 may adjust the aspect ratio of the image according tothe landscape mode or the portrait mode of the head 10, and may outputan image through the display panel 11 (S33).

Referring to FIGS. 35 and 42 , a wireless charging unit 19 may bepositioned between the plate 16 and the back cover 15. The wirelesscharging unit 19 may be coupled to the frame 13 (see FIG. 3 ) and/or theback cover 15. The wireless charging unit 19 may wirelessly provideelectrical energy to an electronic device through an inductive couplingmethod or a resonance coupling method. The wireless charging unit 19 mayreceive power from a power supply board Pu.

An inductive coupling method uses a principle that when the strength ofa current flowing in one coil of two adjacent coils is changed, themagnetic field is changed by the current, and thus, the magnetic fluxpassing through the other coil is changed, so that the inducedelectromotive force is generated. That is, without moving two conductorsspatially, if a current in only one coil is changed while two coils arebrought close to each other, an induced electromotive force is generatedin the other coil. In this case, the frequency characteristic is notsignificantly affected, but the power efficiency is affected by thealignment and distance between a transmitter (i.e. the wireless chargingunit) and a receiver (i.e. the terminal) including each coil.

A resonance coupling method uses a principle that a part of the magneticfield change generated by applying a resonance frequency to any one oftwo coils spaced apart by a certain distance is applied to the othercoil of the same resonance frequency to generate an inducedelectromotive force. That is, when the transmitter and the receiverresonate respectively with the same frequency, the electromagnetic wavesare transmitted through a short-range electromagnetic field, and thusthere is no energy transfer when the frequencies are different. In thiscase, it may be significantly important to select a frequency. Inaddition, since there is no energy transfer between different resonantfrequencies, a charging target device may be selected through resonantfrequency selection.

The wireless charging unit 19 may include a coil 19 b electricallyconnected to a Printed Circuit Board (PCB) 19 a. The coil 19 b maywirelessly charge the terminal Mo seated in a charging area 15A of theback cover 15.

Accordingly, the terminal Mo may be mounted on the back cover 15 throughthe above-described cradle 90 (see FIG. 2 ), and may be wirelesslycharged by facing the coil 19 b with respect to the charging area 15A.For example, each of the plurality of wireless charging units 19 may bepositioned in each of the plurality of plates 16 a, 16 b, 16 c, and 16d. That is, the display device may provide a plurality of wirelesscharging areas.

The aforementioned wireless charging unit 19 may be electricallyconnected to the controller C0. The controller C0 may identify theposition of the terminal Mo mounted on the head 10, based on theinformation obtained from the gyro sensor 16 (see FIG. 32 ). When it isrecognized that the terminal Mo is mounted on the head 10 so that theterminal Mo overlaps the charging area 15A, the controller C0 mayoperate the wireless charging unit 19. The controller C0 may operateonly the wireless charging unit 19 corresponding to the position of theterminal Mo among the plurality of wireless charging units 19.

Referring to FIGS. 1 to 42 , a display device according to an aspect ofthe present disclosure may include: a base; a head spaced apart from thebase and including a display panel; a pole extending from the base in adirection in which the head is spaced apart from the base; anarticulated connector coupled to the head; an elevating module movablycoupled to the pole in a length direction of the pole; and an armextending in a direction intersecting the head and the pole, the armhaving one side connected to the articulated connector and the otherside connected to the elevating module.

The articulated connector may include a pivot module rotating about apivot axis orthogonal to the head, the pivot module may include: a frontbracket fixed to a rear surface of the head; a rear bracket positionedbehind the front bracket and coupled to the arm; and a pivot shaft whichpenetrates the front bracket and the rear bracket, which is fixed to thefront bracket, and which is rotatably coupled to the rear bracket, thepivot shaft providing the pivot axis.

The pivot module may include: a rear grab which is opposite to the frontbracket with respect to the rear bracket, and which is fixed to the rearbracket, and to which the pivot shaft is rotatably coupled; a cap fixedto a distal end of the pivot shaft; and a disc spring positioned betweenthe rear grab and the cap, and to which the pivot shaft is rotatablycoupled.

The disc spring may further include: a first disc spring convex from therear grab toward the cap; and a second disc spring positioned betweenthe first disc spring and the cap, and convex from the cap toward therear grab.

The pivot module may further include a disc positioned between the reargrab and the disc spring, and to which the pivot shaft is fixed, thedisc may include a plurality of bosses which protrude from the disctoward the rear grab, and which are spaced apart from each other in acircumferential direction of the disc, the rear grab may furtherinclude: a plurality of fixing holes which have a size corresponding tothe boss, and which are spaced apart from each other in acircumferential direction of the rear grab; and a plurality of slotswhich extend in the circumferential direction of the rear grab, whichare longer than the fixing hole, and which are alternately disposed withthe plurality of fixing holes.

The articulated connector may include: a tilt module which is parallelto the head, and which rotates about a tilt axis extending in ahorizontal direction, the tilt module may include: a rear bracketcoupled to a rear surface of the head and rotatably coupled to the armabout the tilt axis; a tilt shaft penetrating the rear bracket in ahorizontal direction and fixed to the rear bracket, the tilt shaftproviding the tilt axis; and an elastic member which is wound around anouter circumference of the tilt shaft in a coil shape, and which has oneend caught on the rear bracket.

The tilt module may further include at least one disc spring which isadjacent to the other end opposite to the one end of the elastic member,and to which the tilt shaft is rotatably coupled, and which is convextoward the one end.

The tilt module may further include a holder to which the tilt shaft isrotatably coupled, and which is coupled to the arm, the holder mayfurther include a pin protruding outward from a side surface of theholder, the rear bracket may further include a guide groove in which thepin is positioned, and which extends while drawing an arc in a rotationdirection of the rear bracket.

The articulated connector may include a first rotation unit which isparallel to the head, and which rotates about a first swivel axisextending in a vertical direction, the first rotation unit may include:a holder coupled to a rear surface of the head; a first body connectedto the holder and opened up and down; and a first fastening member whichpenetrate the opening of the first body, and to which the first body isrotatably coupled, and which is fixed to the arm, the first fasteningmember providing the first swivel axis.

The first rotation unit may further include: a fixing washer which isadjacent to one end of the first fastening member, which is fixed to aninner side of the arm, and through which the first fastening memberpasses; a disc spring which is opposite to the one end of the firstfastening member with respect to the fixing washer, which is convextoward the fixing washer, and through which the first fastening memberpasses; a washer which is opposite to the fixing washer with respect tothe disc spring, and through which the first fastening member passes;and a bushing which is opposite to the disc spring with respect to thewasher, and through which the first fastening member passes, the bushingincluding a flange positioned on the first body, and a portionpositioned in the opening of the first body.

The elevating module may include a second rotation unit which isparallel to the pole, and which rotates about a second swivel axisextending in a vertical direction, the second rotation unit comprises: avertical member coupled to the pole; a second body connected to thevertical member and opened up and down; and a second fastening memberwhich penetrates the opening of the second body, to which the secondbody is rotatably coupled, and which is fixed to the arm, the secondfastening member providing the second swivel axis.

The elevating module may include: a vertical member positioned insidethe pole, extending in a length direction of the pole, and coupled tothe arm; a stem positioned between the vertical member and the base,coupled to the base, and extending in a length direction of the verticalmember; a lower shaft fixed on the stem, and extending in a lengthdirection of the vertical member; and an upper shaft fixed to an innerside of the vertical member, extending in a length direction of thevertical member, and movable along the lower shaft.

The elevating module may further include: a roller coupled to one sideof the vertical member, and in contact with an inner surface of thepole; and a clamp opposite to the vertical member with respect to theupper shaft, and coupled to the vertical member, the clamp may include aprotrusion protruding from the clamp toward the inner surface of thepole, and in contact with the inner surface of the pole.

The display device may further include a cradle caught on one side ofthe head, the cradle including a magnet positioned inside the cradle,the head may include: a back cover forming a rear surface of the head;and a plate opposite to the magnet with respect to the back cover, thecradle may include: a front part at which the magnet is positioned andin contact with the back cover; a rear part positioned behind the frontpart, the rear part being hinged to the front part with respect to ahinge axis between the front part and the rear part; and an elasticmember positioned between the front part and the rear part, fixed to thefront part and the rear part, adjacent to the hinge axis, and providingelastic force to the rear part.

The display device further may include a gyro sensor positioned at thehead, and detecting a coupling between the head and the cradle; and acontroller electrically connected to the gyro sensor, the articulatedconnector may include a pivot module that pivots together with the head,the pivot module including a motor and a power transmission member fortransmitting power of the motor to a pivot axis of the pivot module, andthe controller is configured to pivot the head, based on informationobtained from the gyro sensor.

The display device may further include a wireless charging unitpositioned between the plate and the back cover.

The base may include a plurality of moving wheels coupled to a lowersurface of the base.

The effect of the display device according to the present disclosurewill be described as follows.

According to at least one of the embodiments of the present disclosure,it is possible to provide a display device having a stand of a displaypanel.

According to at least one of the embodiments of the present disclosure,it is possible to provide a structure that can freely adjust the angleor position of a head having a display panel.

According to at least one of the embodiments of the present disclosure,it is possible to provide a structure capable of implementing variousmotion operations of a display panel, such as a pivot motion, a tiltmotion, a swivel motion, and an elevating motion, independently of eachother.

According to at least one of the embodiments of the present disclosure,it is possible to provide a mechanism for automatically adjusting themotion of a head in a user-friendly manner.

According to at least one of the embodiments of the present disclosure,it is possible to provide a structure capable of firmly coupling acradle for placing a terminal such as a smartphone to a head.

According to at least one of the embodiments of the present disclosure,it is possible to provide a structure capable of wirelessly charging aterminal such as a smartphone placed on a cradle.

Any or other embodiments of the present disclosure described above arenot mutually exclusive or distinct. Any or other embodiments of thepresent disclosure described above may be used jointly or combined ineach configuration or function.

For example, it means that configuration A described in a specificembodiment and/or drawings may be combined with configuration Bdescribed in other embodiments and/or drawings. That is, even if thecoupling between the components is not directly described, it means thatthe coupling is possible except for the case where it is described thatthe coupling is impossible.

The above detailed description should not be construed as restrictive inall respects and should be considered as illustrative. The scope of thepresent disclosure should be determined by a reasonable interpretationof the appended claims, and all modifications within the equivalentscope of the present disclosure are included in the scope of the presentdisclosure.

What is claimed is:
 1. A display device comprising: a base; a head spaced apart from the base and including a display panel; a pole extending from the base in a direction in which the head is spaced apart from the base; an articulated connector coupled to the head; an elevating module movably coupled to the pole in a length direction of the pole; and an arm extending in a direction intersecting the head and the pole, the arm having one side connected to the articulated connector and the other side connected to the elevating module.
 2. The display device of claim 1, wherein the articulated connector comprises a pivot module rotating about a pivot axis orthogonal to the head; wherein the pivot module comprises: a front bracket fixed to a rear surface of the head; a rear bracket positioned behind the front bracket and coupled to the arm; and a pivot shaft which penetrates the front bracket and the rear bracket, which is fixed to the front bracket, and which is rotatably coupled to the rear bracket, the pivot shaft providing the pivot axis.
 3. The display device of claim 2, wherein the pivot module comprises: a rear grab which is opposite to the front bracket with respect to the rear bracket, and which is fixed to the rear bracket, and to which the pivot shaft is rotatably coupled; a cap fixed to a distal end of the pivot shaft; and a disc spring positioned between the rear grab and the cap, and to which the pivot shaft is rotatably coupled.
 4. The display device of claim 3, wherein the disc spring further comprises: a first disc spring convex from the rear grab toward the cap; and a second disc spring positioned between the first disc spring and the cap, and convex from the cap toward the rear grab.
 5. The display device of claim 3, wherein the pivot module further comprises a disc positioned between the rear grab and the disc spring, and to which the pivot shaft is fixed, wherein the disc comprises a plurality of bosses which protrude from the disc toward the rear grab, and which are spaced apart from each other in a circumferential direction of the disc, wherein the rear grab further comprises: a plurality of fixing holes which have a size corresponding to the boss, and which are spaced apart from each other in a circumferential direction of the rear grab; and a plurality of slots which extend in the circumferential direction of the rear grab, which are longer than the fixing hole, and which are alternately disposed with the plurality of fixing holes.
 6. The display device of claim 1, wherein the articulated connector comprises: a tilt module which is parallel to the head, and which rotates about a tilt axis extending in a horizontal direction, wherein the tilt module comprises: a rear bracket coupled to a rear surface of the head and rotatably coupled to the arm about the tilt axis; a tilt shaft penetrating the rear bracket in a horizontal direction and fixed to the rear bracket, the tilt shaft providing the tilt axis; and an elastic member which is wound around an outer circumference of the tilt shaft in a coil shape, and which has one end caught on the rear bracket.
 7. The display device of claim 6, wherein the tilt module further comprises at least one disc spring which is adjacent to the other end opposite to the one end of the elastic member, and to which the tilt shaft is rotatably coupled, and which is convex toward the one end.
 8. The display device of claim 6, wherein the tilt module further comprises a holder to which the tilt shaft is rotatably coupled, and which is coupled to the arm, wherein the holder further comprises a pin protruding outward from a side surface of the holder, wherein the rear bracket further comprises a guide groove in which the pin is positioned, and which extends while drawing an arc in a rotation direction of the rear bracket.
 9. The display device of claim 1, wherein the articulated connector comprises a first rotation unit which is parallel to the head, and which rotates about a first swivel axis extending in a vertical direction, wherein the first rotation unit comprises: a holder coupled to a rear surface of the head; a first body connected to the holder and opened up and down; and a first fastening member which penetrate the opening of the first body, and to which the first body is rotatably coupled, and which is fixed to the arm, the first fastening member providing the first swivel axis.
 10. The display device of claim 9, wherein the first rotation unit further comprises: a fixing washer which is adjacent to one end of the first fastening member, which is fixed to an inner side of the arm, and through which the first fastening member passes; a disc spring which is opposite to the one end of the first fastening member with respect to the fixing washer, which is convex toward the fixing washer, and through which the first fastening member passes; a washer which is opposite to the fixing washer with respect to the disc spring, and through which the first fastening member passes; and a bushing which is opposite to the disc spring with respect to the washer, and through which the first fastening member passes, the bushing including a flange positioned on the first body and a portion positioned in the opening of the first body.
 11. The display device of claim 1, wherein the elevating module comprises a second rotation unit which is parallel to the pole, and which rotates about a second swivel axis extending in a vertical direction, wherein the second rotation unit comprises: a vertical member coupled to the pole; a second body connected to the vertical member and opened up and down; and a second fastening member which penetrates the opening of the second body, to which the second body is rotatably coupled, and which is fixed to the arm, the second fastening member providing the second swivel axis.
 12. The display device of claim 1, wherein the elevating module comprises: a vertical member positioned inside the pole, extending in a length direction of the pole, and coupled to the arm; a stem positioned between the vertical member and the base, coupled to the base, and extending in a length direction of the vertical member; a lower shaft fixed on the stem, and extending in a length direction of the vertical member; and an upper shaft fixed to an inner side of the vertical member, extending in a length direction of the vertical member, and movable along the lower shaft.
 13. The display device of claim 12, wherein the elevating module further comprises: a roller coupled to one side of the vertical member, and in contact with an inner surface of the pole; and a clamp opposite to the vertical member with respect to the upper shaft, and coupled to the vertical member, wherein the clamp comprises a protrusion protruding from the clamp toward the inner surface of the pole, and in contact with the inner surface of the pole.
 14. The display device of claim 1, further comprising a cradle caught on one side of the head, the cradle including a magnet positioned inside the cradle, wherein the head comprises: a back cover forming a rear surface of the head; and a plate opposite to the magnet with respect to the back cover; wherein the cradle comprises: a front part at which the magnet is positioned and in contact with the back cover; a rear part positioned behind the front part, the rear part being hinged to the front part with respect to a hinge axis between the front part and the rear part; and an elastic member positioned between the front part and the rear part, fixed to the front part and the rear part, adjacent to the hinge axis, and providing elastic force to the rear part.
 15. The display device of claim 14, further comprising: a gyro sensor positioned at the head, and detecting a coupling between the head and the cradle; and a controller electrically connected to the gyro sensor, wherein the articulated connector comprises a pivot module that pivots together with the head, the pivot module having a motor and a power transmission member for transmitting power of the motor to a pivot axis of the pivot module, and wherein the controller is configured to pivot the head, based on information obtained from the gyro sensor. 